a-be aaaa aaab aaad aaae aaar aaav aaba aabb aabd aabt aada aade aadt aaea aaev aara aard aare aart aata aatt aava abaa abab abad abae abar abat abb- abba abbb abbe abbr abbt abda abed abee aber abet abra abta abva abvd adaa adab adad adae adar adat adba adda addd adde addr adea adeb adee ader adet adra adre adta advb advt aede aedt aeer aer- aera aerd aeta aetr aett aeva arab arad arae arar arat arba arbe arda arde area ared aree aret arev arr- arra arre arrr arrt arta arte artr artv arva arve at-t ataa atab atad atae atar atat atdt atea ated atee ater atra atre atta atte attr avab avar avat avda avea aver avra avre avva baaa baad baar baat baba babb babe babr bada badb badd bade badr baed baer bar- bara barb bard bare barr bart bata bate batt bava bave bbad bbbb bbdd bbeb bbet bd-r bdav bead bear beat beav beba bebb bebe beda bede beeb beed beer beet bera berd bere berr bert beta bete bett betv brab brad brae brat brav brda brdt brea breb bred bree brer bret brev brrr btaa btdt btrt bttb d-tv daab daad daae daar daba dabb dabt dada dade daeb daer dara darb dard dare darr dart data date datr datt dava dave dbar dbtt dddd ddre ddtv dead deae dear deba debe debt deda dedd dede deeb deed deer deet deev der- dera derb dere derr derv deta dete detr deva deve draa drab drad drar drat drba drda drea dred dree dret drev drra dtaa dted dvar dvda dvdr dvra eaba eada eadb eadd eara earb eard eare eart eata eate eave ebba ebbr ebed eber edad edar edda edde ede- edea eder edra edta edtv edve eede eeea eeee eera eeta eete eeva erad erat erba erbb erbe erda erde ereb ered erer eret erev erra erre erta erve etat etbr etee eter etra etre etta ette evae evar evat evdb evea ever evet evra evre raab raad raat raba rabb rabe rada radd rade radr radt raed raer rara rarb rare rata rate ratt rava rave rbbb rbbr rder rdev rea- read reae rear reat reba rebb rebe reda redd rede redr reeb reed reet reev rera rerd rere rert reta retd rete retr rett reva revd reve rrad rrat rred rrrr rtdt rtee rtva rtve rved rver taa- taar taat taba tabb tabe tada tade taer tara tarb tard tare tarr tart tata tatb tate tatr tatt tatv tava tave tbar tbrb tbta tddb tdra tdtv tead tear teat teba teda tedd tede teed teer teet teev ter- tera tere terr teta tete tetr tett teva traa trab trad trae trat trav tre- trea tred tree tret trev trra trte trtr ttab ttbb tter tttt tvad tver tvrr tvtv vaad vaar vaat vada vade vara vard vare varr vart vata vate vatt vava vder vdre vear veat veba veda vede veer veet ver- vera verb verd vere vert veta vete vetr veve vrav vrba vred vret vver vvvv